Would a 8x6 cab be crazy?

[Petebass]

When you parallel two drivers you gain 3dB from the increased power resulting from the halved impedance. You also get 3dB from the doubled radiation efficiency gained by doubling the area of the radiating plane. Net gain: 6dB.

If you series two drivers you lose 3dB from the doubled impedance but still gain 3dB by doubling the radiating area. Net gain: 0 dB.

Agreed but we were talking about efficiency only. It's way to early to be talking about wether or not the power from the amp is constant or not.

 

[billfitzmaurice]

Agreed but we were talking about efficiency only. It's way to early to be talking about wether or not the power from the amp is constant

We're talking about sensitivity, not efficiency. It's not the same thing, and efficiency is never used as a measurement of loudspeaker perfomance.

Amp power is not a constant. However, amp output voltage is. It's a common misconception that total acoustical output is power limited, and thus the rush to use the lowest possible load impedance in the mistaken assumption that maximum power generated will result in maximum acoustic output. What actually limits acoustic output is the voltage swing of the amp, and that is finite no matter what the impedance load. Since you cannot increase the voltage that an amp is capable of delivering into a load the way to gain maximum acoustic output is via maximum voltage sensitivity.

 

[stropsrats]

I know this seems like it is off subject so I'll post it as a question: would anybody be interested in starting a thread about the difference between voltage drive amps and current amps? It came up in the last post and so I thought I might get something going. I would like to know more about that aspect of amplifiers.